#include<iostream>
#include<string>
#include<algorithm>
using namespace std;
int main()
{
    string s,a,b;
    char c;
    while(cin>>c,c!=',') s=s+c;
    while(cin>>c,c!=',') a=a+c;
    while(cin>>c) b=b+c;
    int sa=s.size(),aa=a.size(),ba=b.size();
    int s1,s2;

    for(int i=0;i+aa<=sa;i++)
    {
        int j=0,count=0;
        while(j<aa&&s[i+j]==a[j])
        {
            j++;
            count++;
        }
        if(count==aa)
        {
            s1=i;

            break;
        }


    }
    for(int i=sa-ba;i>=0;i--)
    {
        int j=0,count=0;
        while(j<ba&&s[i+j]==b[j])
        {
            j++;
            count++;
        }
        if(count==ba)
        {
            s2=i;

            break;
        }

    }
    s1+=aa-1;
    if(s1>=s2) {
        puts("-1");
        return 0;
    }


    int mo=s2-s1-1;
    cout<<mo<<endl;
    return 0;
}